Sheave stand for looms



April 5, 1932. A. A. GORDON SHEAVE STAND FOR LOOMS Filed Jan. 5, 1931 2 Sheets-Sheet JM/EN 727E" AL5fiTA.50H00/v A 77'UENEY5 April 5, 1932- A. A. GORDON 1,852,078

SHEAVE STAND FOR LOOMS Filed Jan. 5; 1931 2 Sheets-Sheet 2 JTVl/E/V Tm? ALBEH TA. GU/FUU/v' Ww-v-M ATTUEWE Y5 Patented Apr. 5, 1932 Unites stares Parent caries ALBERT A. GORDON, OF WORCESTER, MASSACHUSETTS, ASSIGNOR T0 CROMPTON &

KNOX/VIBES LOOTM WORKS, OF WORCESTER, LTASSACHUSETTS, A CORPORATION OF MASSACHUSETTS SHEAVE STAND FOR. LOOMS Application filed January 5, 1931. Serial No.. 506,536.

This invention relates to sheave stands on the harness motion of looms and 1t 1s the general object of the invention to provide a simplified device of this type which can be moved along the loom arches to any desired position and which is so shaped as to facilitate manufacture and to be more eflicient in performing its functions. I

In types of looms having a harness motion such as a dobby at one side it is necessary to provide sheaves around which the harness cords extend, the latter being raised or lowered by the harness motion so as to move the harnesses in their proper sequence. It is desirable to be able to move these sheaves along the arches to correspond with the location of the hooks in the harness frames or the proper position for applying the lifting force to the frames and when once the sheaves are in correct position it is important to keep them in fixed relation to the arches. It is an important object of my present invention to provide a sheave stand formed preferably of sheet metal which shall be held to the arches frictionally through a clamping action resulting from. the use of bolts or the like extending through parts of the stand.

It is another object of the invention to provide a suspension bolt together with a shaft and rotatably -mountingthe sheaves so that the shaft may be readily removed by being lifted with respect to the supporting bolt, the latter is mounted for vertical adjustment in the arches so as to place the sheave properly with respect to the harness frames. The shaft engaging part of the bolts may be disposed so as to prevent endwise displacement of the shaft by engagement with a part of the stand. 1

l/Vith these and other objects in view which will appear as the description proceeds, my

invention resides in'the combination and arrangement of parts hereinafterdescribed and set forth in the claims.

In the accompanying drawings, wherein a convenient embodiment of my invention is set forth,

a Fig. -1 is adiagrammatic front elevation of-a loom having such parts as cooperate with my invention,

both.

Fig. 2 is an enlarged rear elevation of a portion of the front arch together with the sheave stand support thereby,

Fig. 3 is a vertical section on line 33-of Fig; 2, 1 I

Fig. 4 is a perspective view of a portion of the stand,

Fig. 5 is an enlarged end view showing one of the suspension bolts and the shaft, Fig. 6 is a section through the notch at the one end of a shaft, and

Fig. 7 is a top plan view of'the structure shown in Fig. 2 with the sheave stands at each end of a shaft set forth.

Referring to the drawings I have shown loom arches 10 and 11 and harness frames 12 which are raised with respect to the arches by means of cords 13, the latter extending partly around sheaves 14 and then to the left to have connection with a harness motion or ack 15. The latter is moved to the right or left according to the desired sequence of harness frames in order to provide a pattern in the cloth.

My invention relates to themeans for supporting the sheaves and in carrying my invention into effect I provide each of the front and back arches with the same construction so that a description of one will sufiice for A stand 20 is formed as set forth more particularly in Fig. 4 of sheet metal and has ing horizontally from the web. A vertically disposed slot 27 extends through the wall and a portion of the top and bottom arms 22 and 23.

A pair of bolts 28extend through the arms 22 and 23 parallel to the wall 21. The upper end of said bolts extend through a locking plate 29 which has a rib 30 to enter a notch 31 formed in the hub 32 of a wing nut 33. :The latter has extended therethrough the upper threaded end ofa suspension bolt 34 shown more particularly in Fig. 5.

that the part'of the shaft lying between the slab faces 39 and above the notch may be raised in the space between said portion to permit assembly or removal. The part 37 of the bolt 34 has a downwardly extending stop arm 42 which engages the lower flange 26 of the arch. The purpose of the stop arm is to prevent the supporting bolt from moving to the right as viewed in Fig. 3 beyond the end of the shaft and thus allowing the sheaves to drop into the loom.

In assembling, each arch will have fittedthereover a pair of the stands shown in Fig. 4, the walls 21 of the latter facing each other. The belt 34 will be placed in the slot 27 before the stand 20 is put over the arch. A plate 29 will then be placed on the top of each of the arms 22 and the bolts 28 extended through this plate, and the two arms 22 and 23, the bolts being held in clamped position by nuts 41. It is to be understood that the arms 22 and 23 can be spread apart seinewhatso as to permit the flanges 24 to slide over the top and bottom flanges 26 of the arch, but that when the nuts 41 aretightened the arms 22 and 23 will be drawn together so that the flanges will be held in tight rela- -tion with respect to the arches.

The ends of the shafts may then be inserted in the suspension bolts as suggested in Fig.

-5, the sheaves having previously been strung along the shafts, and the threaded ends of the bolts can be extended upwardly through those parts of the slots 27 which lie in the arms 22. The thumb nuts 33 are then threaded over the bolts 34 and when the proper ele 'vation'of the shafts has been attained these nuts will be brought to rest with the ribs fitting into the notches.

From the foregoing it will be seen that I have provided a simple form of sheave stand for the arches of the loom so constructed that the tightening of bolts 28 will require the flanges 24 to have holding engagement wlth the arch. F urthermore, the supporting bolt is constructed so as to permit vertical movement the shaft for purposes of removal, but the shaft and bolt when in normal position are so related to each other as to prevent rotation of either of them. F urthermore, the .walls 21 act to prevent endwise movement of the shaft by engagement with the supporting bolts, and slot 27 extending as set forth herein permits easy assembly of the parts.

ing through the arms to hold the same and the stand in position on the arch, a wall forming part of the stand connecting the arms and 7 having a verticalslot therein, and a sheave shaft extending through the slot and supported relatively to the stand.

2. In a loom having an arch and a set of harness sheaves, a stand on the arch having a vertical wall provided with a vertical slot, a shaft for the sheaves extending through the slot, and a holder for the shaft supported by the stand and extending along the wall and restrained by the latter .against motion in a direction toward the sheaves.

3. In a loom having an arch anda set of harness sheaves, a stand on the arch having a. vertical wall provided with a vertical slot, a shaft for the sheaves extending through the slot, and a supporting bolt held by the stand and surrounding the shaft, the sides of the slot limiting movement of the shaft in a direction transversely of the shaft .a vertical wall provided with a vertical slot,

a shaft for the sheaves extending through the slot, and a shaft supporting member carried by'the stand and having an opening into which the shaft extends, the height of the opening being equal atleast to the vertical dimension of that part of the shaft projecting beyond the member with respect to the wall, and the width of said opening being less than the diameter of the shaft.

5. In a loom having anrarch anda set of harness sheaves, a stand on the arch having a vertical wall provided with a vertical slot, a shaft for the sheaves extending through the slot, and a shaft supporting member having interlocking engagement with the shaft to prevent movement of the member relatively to the shaft in'a direction away from the sheaves, and the member engaging the wall and prevented by the latter from movement toward the sheaves. e

6. In a loom having an arch and a set of harness sheaves, astand on the arch having a vertical wall provided with a vertical slot, a shaft for the sheaves extending through the slot, a shaft supporting member'having an opening therethrough with a portion extend- Having thus describedmy invention itingunder the opening, the shaft having a notch in which the said portion is located, said notch and portion coacting to prevent movement of the member away from the sheave relatively to the shaft, and the wall engaging the member to prevent movement thereof in a direction toward the sheaves.

7 In a loom having an arch and a set of harness sheaves, a stand on the arch having a vertical wall provided with a vertical slot,

10 a shaft for the sheaves extending through the slot, a shaft supporting member having an opening therethrough with a portion extending under the opening, the shaft having a notch in which the said portion is located,

1 said notch and portion coacting' to prevent movement of the member away from the sheave relatively to the shaft, and the wall engaging the member to prevent movement thereof in a direction toward the sheaves,

the height of the wall being such that the shaft can be raised to a point where the portion will be entirely out of the notch to permit longitudinal movement of the shaft relatively to the member in a direction toward the sheaves.

8. In a loom having an arch and aset of harness sheaves, a stand on the arch having a vertical wall provided with a vertical slot, a shaft for the sheaves extending through the slot, the slot extending through the upper arm, and a shaft carrying bolt extending through the slot in the said upper arm and having a broadened lower part to engage the walls and be limited by the latter in a direction toward the sheaves.

9. In a loom having an arch and a set of harness sheaves, a sheave stand held to the arch and having a vertical slot therein, a shaft extending through the slot and limited by the wall of the slot as to horizontal movement transversely of the axis thereof, and a supporting member for the shaft held against movement relatively to the shaft in a direction away from the sheaves and engaging the wall and limited by the latter in movement toward the sheaves.

10. In a loom having an arch and a set of sheaves, a stand held to the arch and having a vertical slot therethrough, a shaft for the sheaves, and a support for the shaft having a part lying between the arch and the stand, the support having a holding part extending upwardly by which the support is held to the stand, and said support having a depending guide arm projecting through the bottom of the slot and limiting movement of the shaft laterally.

In testimony whereof I have hereunto affixed my signature.

ALBERT A. GORDON. 

